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65 words, 1 min read

Recently, I was working on an application that needed to know if it was connected to the internet. A common way to do this is to ping DNS servers like 8.8.8.8 (Google) or 1.1.1.1 (Cloudflare). However, this uses the ICMP protocol (which only checks for basic network connectivity), while I wanted to exercise the full stack used by real HTTP clients: DNS, TCP, and HTTP.

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